Apnea detection from photoplethysmography signal using dicrotic notch

Abstract Photoplethysmography signal (PPG) provides information about the cardiovascular, respiratory, or nervous system activity. Recent studies proposed methods of apnea identification from PPG using amplitude baseline modulation, area under curve. We hypothesized that analysis dicrotic notch could improve sensitivity and specificity detection. applied four to detect records experimentally obtained 10 volunteers, where each volunteer simulated three apneic pauses. adopted Area Pulse wave parameters, we Dicrotic parameter. For methods, determined delay in detection The average detecting an pause was 6.1 s. Combining parameters with increased 73.8% 80.0%, although decreased 91.1% 85.6%. newly parameter showed its potential for automatic